1) Eurasian vine 2) Genus pisum 3) Rosid dicot genus 
Pisum is a genus of the family Fabaceae, native to southwest Asia and northeast Africa. It contains one to five species, depending on taxonomic interpretation; the International Legume Database (ILDIS) accepts three species, one with two subspecies: Pisum sativum (the field or garden pea), is domesticated and is a major human food crop, see Pea an...
[n] - small genus of variable annual Eurasian vines: peas
genus Pisum noun small genus of variable annual Eurasian vines: peas